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Bone mineral density in patients with hypercalciuric nephrolithiasis
J R Zanchetta1, G Rodriguez, A L Negri
1Metabolic Research Institute, Buenos Aires, Argentina.
Nephron
|January 1, 1996
Summary
Adults with idiopathic hypercalciuria and kidney stones show reduced lumbar spine bone density (LSBD). This decrease in bone mineral density is linked to the duration of their stone disease, suggesting a chronic calcium imbalance.
Area of Science:
- Nephrology
- Endocrinology
- Bone Metabolism
Background:
- Idiopathic hypercalciuria is a common metabolic disorder associated with kidney stone formation.
- Bone mineral density assessment is crucial for evaluating skeletal health in patients with metabolic diseases.
Purpose of the Study:
- To investigate bone mineral density (BMD) in adult patients diagnosed with idiopathic hypercalciuria and renal lithiasis.
- To determine the relationship between lumbar spine bone density (LSBD) and clinical factors such as age and duration of stone disease.
Main Methods:
- Bone mineral density was measured at the lumbar spine (LSBD) in 50 adult patients (30 premenopausal women, 20 men <55 years) with idiopathic hypercalciuria.
- Patient LSBD was compared to age- and sex-matched controls.
- Correlation analysis was performed to assess the relationship between LSBD, age, and duration of renal lithiasis.
Main Results:
- Patients with idiopathic hypercalciuria exhibited significantly lower LSBD (0.940 +/- 0.106 g/cm2) compared to controls (1.112 +/- 0.037 g/cm2; p < 0.001).
- LSBD was found to be independent of age.
- A significant negative correlation was observed between LSBD and the duration of stone disease (r = -0.52, p < 0.001).
Conclusions:
- Adult patients with idiopathic hypercalciuria demonstrate reduced lumbar spine bone density.
- The observed decrease in LSBD is likely attributable to a sustained negative calcium balance over time.
- Duration of renal lithiasis is a significant factor associated with diminished bone mineral density in this cohort.